No not petty and not just you, jj. The cosmetic one is really annoying and even more so when the product is in a pump bottle which you can't cut open.
Re emails - it's not just social groups who do that. I often get such emails from businesses in which case, as well as being annoying, and as you say assisting in the spread of spam and viruses, it is also a gross breach of privacy. I have discovered that many people don't know how to blind copy or why they should.
I work in retail and my big bugbear is people who thrust scrunched or folded notes at you. Are wallets not manufactured anymore?
Regards,
Barbara Anne