Is this a bot or a scammer or what??

These ‘comments’ appeared in my WordPress notifications from yesterday. I have no idea what they mean. Is this a bot, many bots, one person with many bogus accounts, or a weird scammer [for what though]?

[image error]

Has anyone else been visited by this weirdness? More importantly how do I stop this ‘thing’ from visiting again? Any ideas?

Baffled,

Meeks