For me it appears to be a problem how the rules are currently enforced (at least for DotA, dunno about other map problems).
Abusing votekick:
Using !votekick to spam or when the victim has not done anything wrong.
Also refusing to votekick when a player has clearly violated a rule (make sure to ensure it via all chat if you are on the opposite team).
Note:
It is possible for a player to ruin the game by both being new and refusing to learn. In this case votekick may be used but it is up to the players in the game to decide.
You must votekick a player who has broken any of the rules (keep in mind that you should not use a votekick for verbal offences (use !ignore <user> instead)).
Kicks and bans are enforced depending on how severe the rule has been violated. That means what the players think may be against the rules, could turn out to be not votekick-able by a mod's judgement. Be careful and pay attention to what happens/for what you vote.
Votekicks are ban-able even if they are not passed. Do not randomly start votekicks or vote without proper reasons. ENT keeps the right to enforce punishments as warning. Voting for something means you agree with it. You have a responsibility and you are accountable for what happens with your vote.
I suggest that the votekick initiator is required to state his reasons in all-chat. This should prevent a lot of confusion about validity of votekick attempts, since a votekick without reason statement can always be seen as abuse and a stated reason is a good base to judge over other players who should/shouldn't vote for this reason.
Secondly, i suggest to have a 3-stage punishment for votekick abuse:
1) The initiator should be punished at least twice as much as the voters, since there is no real excuse for false initiation
2) The teammembers of the votekick-target usually have better means to validate the votekick reason and therefore should be responsible for misjudgement (=punish)
3) The enemies of the votekick-target have restricted vision of that player and are often only informed per chat anyway, so they should not (or rarely) be punished. Their votes alone won't be enough to pass --> (2) can prevent it
Background is, that it's really a bad feeling when your enemy team wants to kick one of their members and you don't know what to do, because you want to give them a good game but are unsure about the severity of problems (rule break or not). This are the kind of ban cases, where good players without any ill intent are caught in one or the other way sometimes --> bad for ent community.
Feel free to move this to any other discussion forum, if it is not appropriate in the suggestion area

// €dit: added [Rules] to the title