Regulating participants to only those who have a purpose and meaningful reasons, would mean higher bid-ask spreads, less liquidity and less turnover, which then means those markets would probably cease to exist. Gamblers in these special markets are a net-positive, non-gamblers are happy to give some gamblers a payday or some drink money, since it allows non-gamblers to focus on their main activity, instead of doing their activity and gamble that everything turns out fine.
As an Oslo resident and occasional christmas mall shopper, I can attest that there has been zero EV fires in relation to this scenario. Neither has there been any serious scenarios started due to an EV. Few fires has started happened to unsafe wall charging with extension or bad circuits not approved for EV charging (Using standard electrical socket charging EVs at personal homes is now outlawed, but not enforced, and installing approved and much faster 16V chargers at homes and garages is a very common selling point in real estate.)
Anecdotally, an airport parking garage burnt down in Stavanger due to a diesel Opel Zafira from aprox 07’ self-catching fire sometime the last two year, it was speculated at that time that it was an EV in media (Sorry no source, easily googleable).