Sure, why not. I am in favor of free markets and less regulations. The prohibiting of certain types of trading and activity is unnecessary regulation.

Also, if you try to regulate (stop) account trading and farming, then all you are going to do is force traders and farmers to evolve so that their behavior is less obvious.

I listed a number of reasons why account trading is healthy/good here.

You are going to have to cite evidence if you want this statement to be credible.

The last exit scam that I am aware of involving purchased accounts was master-p, however that happened over a year ago. Another example of a successful scam involving purchased accounts was 'bitcoin black friday' (or something with a similar name). There have also been a handful of small scale scams involving the scammer getting very small amounts, possibly less than the cost of the purchased accounts used to scam. In the case of master-p, he was able to build up all of his trust starting from when he purchased his account, and I believe that the other accounts he used to help his scam were also being used by him for a long time, so one could argue that his scam would have been just as successful if he had created a new account at the time he purchased each of his accounts.

There have been a fairly large number scams involving accounts that were fairly clearly hacked (not purchased), there are probably a couple of these a week. Another pain point in scams/thefts has been imposter accounts, and this happened frequently enough so that theymos put a warning on every PM that newbies send. If you want to talk exclusively about exit scams, then both dicebitco.in and dice.ninja each ran away with millions of dollars worth of bitcoins, which is probably at least 10 times more then the total amount that purchased accounts stole in the past 3 years. maidak is another example of an exit scam that did not involve a purchased account. I believe there also have been one or two physical coin manufacturers that have run away with BTC stored in their coins somewhat recently.


edit:
on the topic of exit scams, I believe that the gambling site 'satoshi dice' has changed ownership several times over the years, however they are currently entrusted with several thousand bitcoin of other people's money, and appears to be acting honestly AFAICT