No. That would be reckless and would compromise Tor Browser Bundle from the outset. By default, the NoScript plugin disallows JS from running globally
from: https://tails.boum.org/doc/anonymous_internet/Tor_Browser/#i...
To allow more control over JavaScript, for example to disable JavaScript completely on some websites, Tor Browser includes the NoScript extension.
By default, NoScript is disabled and some JavaScript is allowed by the Torbutton extension as explained above.
So, "Yes", this is reckless and would compromise Tor Browser from the outset.
Maybe so, but I think the GP is correct. At least, it was true a year or so ago.