The power of Family Search, and to a lesser extent, WikiTree, is that it is possible to easily support your conclusions with primary record evidence that other contributors can easily view. Unfortunately, it is possible to link basically anything (or nothing) as a record in Sources on Family Search, but serious researchers have the ability to add, edit or remove them. It is the best option for presenting genealogy research, based on easily verified primary record evidence, short of self publishing.?
That being said, yeah, anyone can put anything on either site, and do.
Kevin
Kevin Daniel