Submitted by matthiaskrgr
From what I see, obstacle labels are always shown.
When zooming out, they are not scaled (probably to have them still readable?) so they are covering quite some area.
In order to make them less annoying while working with zoom, I think they should be transparent.

While transparent may be a good idea, being able to hide obstacle labels without
hiding the obstacles themselves is an even better idea >.>

Sometimes I need a global vision of the level, and being forced to see by
collisions - is not that neat, you know. :<

A hack was added on http://rb.freedroid.org/r/2366/

Commit 
0fda77e81eaccadf74983509fc176c42d94c6331 
seems to do the trick

If you disagree, by all means reopen this 
ticket.

Jesusalva