Hi rebecca,
I do agree with you that is tedious play against that kind of trolls and bingo players, but I don't think that block them is the right solution. From my point of view, everybody has the right to play, no matter how. Anyway, they can also create a new account, so blocking them won't solve a lot, and gives us a lot of useless work maintaining a black-list. Besides, there is a lot of people with low average, if we block them all, we'd lose a lot of people and we can't afford that. I know this is not what you wanted to hear, but I hope you understand.
However, I'd like to offer a workaround, that Ghost__ already noted: private cups/tournaments. Do you know BBC and WeC? Those are alternative championships made by players in which is difficult to encounter those kind of players, specially in WeC, because it has admittance requirements and a player with 2/3/4 as average cannot join. BBC is also an excellent alternative. Despite the fact that BBC has no previous requirements, players with a very bad average, don't usually get invited:
http://bbc.pokerth.net/exp4/description.php
Regarding WeC, here you can find information:
http://pokerth.net/community/wec/12126-we-cup-seasons-2014-2016#19266
(as far as I know, veterans rule is now deactivated, but I'll come back soon). You cannot be a WeC member yet, but you are very close. You only need to reach 300 ranking games keeping 1-4 positions over 60%: you are 62.83% currently, which is more than enough.
Believe me! I understand how you feel, because some time ago I felt the same. That's why I put a lot of effort to become a WeC player. However, in time I got used to play with those players
Kind regards,
tahr