Ironmen should be able to transfer items to other accounts, it's transferring items to ironmen that shouldn't be possible. You can de-iron, so even with what you're suggesting in place you would still be unable to completely stop people from trading stuff to their main. I don't see why it's a problem though, these items weren't obtained in some weird way.
The amount of items ironmen bring into the game are a drop of water into a bucket that is already full, it's really not significant enough to warrant something like this.
I would much rather see it that ironmen can't be given dxp scrolls, ga tickets and member tickets. Last update said they'd only be able to get the latter two from the GE but you can actually trade them. Ironmen shouldn't receive freebies.
I hate when i see pkers killing players in wildy who clearly are not there to pk but yes that happens.
In the wilderness anyone is free to attack you, it does not fucking matter if you're there to pk, pvm or doing a clue scroll. There is nothing that forces you to go to the wilderness, it's entirely your own choice. If you don't wish to be killed don't go to the wilderness.