[twistedpair]

I'm not sure these are that spammy:

* personal computer technical support

* travel agencies

* hair-extensions

What all of them is the ability to be a scam, but any business can scam you. Surprised fortune tellers aren't on there.

[throwit1979]

Surprised fortune tellers aren't on there

They are. #27

[notatoad]

Personal tech support would be a high-chargeback environment with very little way to defend against fraud allegations. Travel agencies sell a product that is to be delivered in a foreign country, which is a scammer's favourite promise. And hair extensions... I guess that must be a high scam market, but I don't know why. Being at the end of the list, I assume it was added after experiencing a lot of issues with that type of business.

[guan]

Travel agencies also sell a product that’s often delivered much later, when the agency or a supplier (hotel, airline, etc.) may no longer exist. This increases the risk of chargebacks.

[alan-crowe]

I thought that those bogus phone calls about "We have detected that your computer has a virus ..." end up directing you to a website to pay to down load some kind of anti-virus software. In which case the "personal computer technical support" business does have a big problem with its spammy end.

[ansible]

* personal computer technical support *

Is this possibly related to the fake Anti-Virus warning popups and the companies that make them?

[miles-myredis]

It is.