As Jessi mentions you are going to get your account suspended (on pretty much any site) if you post lots of spammy links.
I had my Twitter account suspended last year because I had set up a plugin on my blog to retweet links to my old posts and Twitter took exception to this. I removed the plugin and got told not to be a naughty boy again and allowed back in.
I've never lost an account but I can never seem to get an ad campaign to stick on projectwonderful.com, they keep telling me I'm linking to an affiliate site when it's my own site, lol. I add some tracking to my urls and they keep mistaking it for an affiliate link.
I don't set up campaigns with them very often but when I do I'd say that's a pain.
It did happen a lot, I would often see like half a dozen of my answers reposted in a day, then I got smarter. Most of them reported one of my answers, then got on my account to find my other answers and report them, so I made my profile private and it didn't happen as much anymore. And to avoid having my account suspended, and thus all my past answers deleted, I now stop using my accounts once they reach level 3. Haven't had any issue since.
I'm assuming you would post links that were helpful just like I did? Sometimes I didn't even own the sites and still got reported. Good luck to people who have and can make it work for them, I prefer to channel my energy into other areas.
There is actually an easy way to get around being reported Appeal the decision. If you win not only will it increase your level of trustworthiness, but it will also lower that of the people that reported you. Once you do that, even if they report you, Yahoo! Answers won't give it much importance and your answers won't be deleted. Becoming a Top Contributor also helps, and is actually quite easy.
I use Answer Assault, however I use it for posting quickly, rather than spamming, which is basically what it is sold for. I rarely add links to my own sites, but when I do it is meaningful to the question, and every link YA is a good one.
Personally I have lost few Facebook accounts in the past. I didn’t understand the main reason behind this but whenever I asked them they could just reply that I was going too fast in adding more friends. But to me this isn’t wrong why are the friends suggested to you if you have not to add them. I think if I am not wrong that way they were quite wrong.