There are clearly profiles being created only to fill worlds. I suppose you can believe they are all wholly new owners to WiS. I see differently (and in fact, in a couple of cases *know* differently). If a profile is used only to fill the world with no intent to run the team in good faith (which I have seen several times, and I'm not even in a ton of worlds), that is a problem. Even this argument could be put to rest by WiS itself. We shouoldn't have to wonder if what we see is what we get.
Go look at Hall of Fame. I was there for 6 seasons and did pretty well. They had at least 11 openings after roll over (may have been as many as 13). There are at least 3 profiles there created for this season to take over teams (checking date of creation). Are they all "new?" Maybe. However, it is a continuation of what started last season (if not before). This issue is a big part of the reason I left there, and it's getting worse. This is an example of what I meant by some duplicitous behavior not being obvious right away, or could be waved off as "just newbies giving up." We shouldn't have to wonder these things, nor should *we* have to prove them.
Clearly, worlds with smaller numbers of openings to fill will tend to be less affected by this. But unless you simply don't allow 0 history owners in (which I would not if I started a new world, only because you can't tell alias from newbie), those worlds aren't immune either.