Oh don't get me wrong, it's not the end of the world. When I got it I had a very high-light tank that I was already doing maintenance on about once every 3-4 days. Being that I was already dealing with too much labor at that point, the manual removal of bladderwort pushed me over the edge.
If you don't mind the constant maintenance, it really isn't all that big of a deal, and it certainly isn't "bad" for your tank. If anything, it's one more plant that is removing excess nutrients from your water. And for what it's worth, I believe people have similar problems with riccia, and certain types of aquatic moss... where, once they've had it in their tank
once, they have it for life, so they're always picking it out. Just thought I'd let you know, because misery loves company and all...
But it can get unsightly if you leave it alone for too long, so don't let that happen.