One of the websites I host is for a retired elderly middle-aged academic who pens articles about his former field and invites comment.
Almost every week I'll get an email from him along the lines of "Is this worth following up?" and attached will be either a comment reading something like "I love your article. So much good info and useful to me.." or an email from some g3gergergew@gmail.com address saying "We love your site. It has much good infos and is useful but we are notice your CEO could being better..."
No matter how many times I tell him to look for the telltale signs...
* Random gibberish email from address
* Half a dozen links in the comment
* Broken English
* Generic text which could apply to ANY article or website in the bloody world
...he'll still forward them to me and ask if they're worth getting in contact with. Every time, I'm gobsmacked how he can fall for such inept spamming.