Users have extraordinary leeway about what is allowed in their profile (no illegal or offensive content). There's nothing inherently wrong with the content of the original profile — at least in the context of the profile being spam — as long as they are providing a good contribution to the system.
See: Are user names that represent domains allowed?
Unfortunately in this case, the content is also spam and should be flagged and removed on sight (probably the user, too).
But please don't start vandalizing posts in some sort of ill-considered head-on-a-stick gesture. Just remove the links and flag the content as spam as quickly as possible. Vandalism is not a good response to fix a broken window. It makes your site look like trash by adding more bad content; drawing even more attention and exasperating the original problem. Thanks.