AIBU to want to put something nasty in a scam charity bag?

[wickeddevil]

I thought it was odd that the charity bag through the letterbox today was asking for donations of clothes etc for an organisation in the midlands when we live in Essex. Turns out the supposed charity is actually a scam.
Advice on the website I discovered the scam on is to report to trading standards. I will do this tomorrow, but DH suggested filling the bag with dog doo.
AIBU to be tempted by this idea (even though I am too much of a goody to actually do it). What else could I do?

I use them as bin liners.

Name and shame on here?

Report them to the Charity Commission - is there a charity number on the bag?

you could sort of your freezer and put any gone off food in there. wrapped in some old bedding of course

Id go with worn undercrackers myself.

We have got literally hundreds of these charity bags in the cupboard under the sink. We must get at least three a week. Why dont they get the hint after 5 years we've lived here that they arent getting them back again ...