I only TD answers that are incorrect or contain misleading information based off of what I actually know. I'm not going to TD something just because I disagree with an opinion, but if I've experienced something and know it to be true, and someone goes and says otherwise despite not ever having done it, I'll TD it.
Like if I was a barrel racer and I knew kids that successfully and safely ran fast patterns, and someone came along and said all kids are incapable of safely doing so, I would TD it because they're stereotyping and generalizing. Or if I were a reiner and had been to six shows in the last three months and seen the latest judging trends of placing, say, the horses with slower movement (total made up example--I don't know what the trends are in reiners, because I don't show reining), and someone who hadn't shown reining in ten years said that judges only place the speed demons, I would TD it...because how can you judge something you haven't seen or done recently? Trends change. I don't TD other people just because I dislike their discipline (and trust me, there are certain disciplines I don't like, and I could make a lot of generalizations/stereotypes based on the few I know or on what I "used" to do in that discipline, but I don't, because I know that there are probably people doing it correctly that I just haven't seen).
For instance, I could TD all info on barrel racing because I don't particularly like it, because if I were to generalize I would say that all barrel horses are idiots and the riders are clueless--all they know is to go fast and hang on. That's because the few times I actually "did" barrel racing (as a kid for fun at little fun shows) that was the truth. And at some of the smaller shows that offer barrels as well as the events that I do, I still see that. However, I know a couple of barrel racers that do not fit that stereotype, and they ride at a much higher level than the level I was experienced with...so for me to say all barrel racers are idiots would be a false and misleading stereotype. If I were to base my opinion only on the ones who are actually doing it correctly, by watching people who I know to be good at it and watching shows that attract the best riders/horses, that stereotype would be proven false.
Every bit of the information I post either comes from personal (and recent) experience in the show ring or factual knowledge that could be researched and verified. If I post information based on past experience (like, for instance, I showed hunter/jumper in high school...so occasionally I'll answer a question about it based on that), I'll make sure to add that it's been awhile and that my answer is based on what was true then. It's up to the person asking the question to make sure the information is relevant to what they're asking at that time.
I also do not look at TD/TU when choosing a best answer...because there's no way to know if the TD is the result of a 12 year old know it all, a disgruntled person who just doesn't like you, or someone who only thinks they know the truth. Sometimes, the best answers have the most TDs, because it's just hard to hear the truth (or because the information in question is not particularly popular among this group). When choosing a best answer or deciding how to use information, always verify. Never go do something to your horse based on what someone online told you, because you have no way of knowing if they know what they're talking about. Use it for suggestions and as a starting point, but go research the information first.