Are bots/spammers a problem?

I’m interested in other people’s experiences.

It seems like we’re at a ratio of 10:1 or so, dummy new accounts to real ones. That said, besides the constant weeding, does their presence get in the way of your fluthering? I haven’t personally had much trouble, but I wonder sometimes. Do we get political stooge accounts? Do we ever get hit by paid agents of some political entity? Do questions ever get hit so hard by spam they aren’t useful anymore? Are jellies ever targted by scammers? Is anyone using stooge accounts to inflate support for a point of view?