> We've slightly changed campus locations a few times as necessary over the years, to prevent being shut down by the university.
Gaffer tape doesn't leave residue (or very little that's easy to remove), so I can imagine "not damaging the building" (making marks on the glass) being a condition of it staying up.
Different brands vary, but IME this is only correct for a few weeks at best. Otherwise you'll get a lot of residue, and if it's been outside exposed to UV you'll get even more. And duck tape is worse.
> We've slightly changed campus locations a few times as necessary over the years, to prevent being shut down by the university.
Gaffer tape doesn't leave residue (or very little that's easy to remove), so I can imagine "not damaging the building" (making marks on the glass) being a condition of it staying up.