This is a critical attack vector that could be made significantly more secure by making it so traffic between peers is encrypted. Luckily for us, the is BIP 324, which would do just this. BIP 324 has been around for many years, but hasn't been merged and set live at the peer-to-peer layer yet. However earlier today, bitcoin core maintainer Wladimir van der Laan took to Twitter to signal boost BIP 324 and throw out a call to action to other developers for review of pull requests that have been standing idle for an extended period of time. It seems that this BIP has been neglected and could use some love.