Yes, there are many webmasters out there who remove links in an effort to get unidirectional links, but maybe it's not too bad if they do that. At least, it's not such a bad thing as far as Yahoo is concerned, provided you link to sites that are related to your site.

According to Yahoo:

"Link to as many relevant pages as possible. Don't be an island, but at the same time don't link to sites that are not connected to you in any way; this can hurt search engine results. If you link to spam, your ranking could be severely hurt".

FFA is considered bad neighbourhood. We should not link to them.

Yahoo is of the opinion that if you link to informative sites that are relevant to your site content, then you are adding value, and you get points for that.