At any one time, I have at least five different email accounts. Three are permanent and only select people know them. Select being those who don't forward me a lot of crap. Whenever a relative or questionable friend asks me for an email address, they get mey "public" emails.
KMail used to have this feature where you could do a fake bounce back on the email (they've since gotten rid of it). Whenever a relative would send me nonsense crap, I would configure the mail filter to bounce the emails back.
When they ask why the mails keep bouncing back, I simply explain that too many people are sending me the BS emails and it fills my box.
That usually suffices and they lighten up.
As for the cute animals. I like animals. Especially those involving
Domo-kunBut I don't like getting emails about cute animals. So in the past, I compiled an email using animal images from places like rotten.com and
bonsaikitten.com and emailed back to the sender. It's a good message to get them to stop.