I can understand not cutting down trees and trampling flowers (on purpose) but
it should
really be the responsibility of the host to buy go to Nook's or Able's before
inviting people.

Picking weeds isn't really for guests to do. It really is up to the host to keep
their own town
neat (or pay people to do it for them).

Tree shaking is a bit like buying furniture from Nook's. You can get money or
furniture
from it and it's almost the same.

Picking up items should be allowed. The host doesn't have to open his/her gates
immediately when they turn on their game. It only takes a few minutes to run
around the
town checking for dropped or buried items. Same goes for the recycling bin.

The Able's designs is understandable because you don't want to lose any disigns.

Fruit trees... are iffy. Tree shaking is allowed but I agree with asking
permission first.