1. D1 vet baiting and alerting. I think this one is one of the worst offenders here. Most evils don't visit d1 talkers, and the odds of townies visiting said vet bait is much higher. Moreover, some of the vet baits are extremely obvious, so evils tend to leave those people till the end while these people waste all their alerts in the first three days. While it is unfortunate if vet got hit n1 and die, the odds of said event is fairly low. Considering a ranked/ranked practice game where a full game is 15 people, 4 of which are mafia, there are 11 targets to choose from. So that's about 1/11 odds of getting killed by mafia (about 9.1%). Assuming we throw a serial killer in there, the serial killer has 1/14 chance of hitting a specific person (about 7.1%). The total probabiliy of getting hit n1 is 16.2% as a random veteran and that's assuming there is SK together with mafia. These odds are not worth alerting over.
2. Jailor claiming d1 or Mayor revealing d1. This is another one of those stupidly annoying strategies. While I don't deny its effectiveness in some of the games like a SK game or WW game, it can be seriously detrimental when there is an arsonist about. Jailor claiming d1 depends on two things, TP and LO. Problem is, LO doesn't always happen and there won't always be a bodyguard when there is a mayor. Also, when jailors or mayors reveal, they tend to hog up the town protection, this means worse odds for the rest of town. Think of it this way, in a 15 player game, Mafia has 4 members, so that leaves 11 unknown persons to attack. If jailor reveals themselves d1, then there will be 10 unknown persons to attack since mafia needs to get rid of TP before they can strike at jailor. Since jailor can't execute d1 and TIs will likely begin to speak during the second day, maf can quickly narrow down who TP might be and kill TP before decending on the jailor. With TP dead, town has to either hope for a RT TP or LO, both of which may or may not happen, or else the jailor is almost guaranteed to get killed quickly, causing town to lose an important member. That's discounting if an arsonist is in the game, they may just douse the jailor n1 and ignite if they think no lookout is present. I'm not saying Jailor should never reveal, but I think d1 reveals can accelerate the death of the jailor, which in turn will greatly weaken the town.
People need to realize that Town of Salem is about team-work, instead of staying alive yourself. While its is undeniable that some roles are obviously more powerful and useful than others, no one can win the game just by themselves.