I'm embarrassed to say I did NOT know that disable options were available for that many objects. Thank you for giving me more to research!  I guess that means I historically have dropped...

I think the drop/disable decision will often reside in how likely something is anticipated to come back. Disabling objects to push a test case through makes sense, but I can see someone going overboard and keeping tons of disabled objects around because they MIGHT need them again one day. The type-A in me would lean towards dropping more often than not to keep the environment from getting too cluttered.