Unfortunately, I started installing a [blind](https://en.wikipedia.org/wiki/Window_blind) before properly reading up about drywall and studs (my previous flats did not feature drywalls). I ended up drilling a hole into the stud and fastening the blind using [mollies](https://en.wikipedia.org/wiki/Molly_(fastener)).

I tried to pull the mollies out, but they seemed to be anchored quite well. I hate to leave a sloppy job behind me, but I would have it even more if I made a bigger damage.

How bad is it to put mollies into studs? Should I replace the mollies with plastic screw anchors?