Far too broad a brush, for me. AM's are not infrequently the authors of particular insightful and useful replies. Do you want to miss all those to avoid seeing that a sicko has posted a node?

Yes, some AM's are leeches, asking questions like "how to I started the cmd promp?" or 'my PERL code isn't working. Why doesn't it print?

$foo = he is a very new coder;
type foo;
[download]

... and some are trolls...
... but, really, one might just as well require logins to post; that's hardly less draconian.