There are many millions of people doing this on a daily basis.
Millions of people smoke every day- that doesn't mean it's not risky. People take risks every day. I'm just pointing out the risk with using PayPal for non-tangible goods.
With non-PayPal transactions, you get to use your own risk management triage to decide whether or not to accept the payment and deliver the goods. With PayPal, everything is behind a black box.
The last problem we had was with a PayPal Verified Buyer. A week after PayPal approved the payment, they notified us they were investigating the issue (but didn't say what they were investigating). A week after that they told us the transaction was permanently reversed because the credit card was stolen. (Had they told us upfront what the issue was, we could have recovered our money directly- the perp made the payment for a hotel reservation and had not yet checked out when we received the initial message from PayPal. By the time they finally told us the whole story, he was long gone.) Upon further investigation, wee found that the e-mail associated with the account was not the same e-mail as on the reservation- if we had seen the e-mail address, it would have been a big red flag. There were other items that we were not aware of until after the issue had been closed- all of which would have been huge red flags (like account name not matching the CC name, IP address in a completely diofferent country from the card holder's address) that would have required more more manual verification. There is no way we would have ever processed the transaction with all the red flags, yet PayPal happily went on its merry way, disregarding all the red flags. Of course they refuse to take any responsibility for their negligence. In response to the reports we filed with the PayPal, BBB, the local police, and the state Attorney General's office, PayPal basically said we were stupid to trust them (PayPal) in the first place and it's our fault.
a reversal is likely to be no more than an irritation to you
We decided that it was way more than an "irritation" and no longer accept PayPal for payments. (However, we still use it for B2B payments from trusted partners.)