I tend to agree with the first poster re risks but perhaps there's an easy vulnerability we're unaware of. I don't use an O.MG cable but I do use OTG regularly. On some phones it times out and the USB reverts to charging, on others it doesn't which poses a potential risk (but OTG-always-on is more convenient so I tend to leave it configured on phones that allow it).

Infection is now potentially higher due to increased OTG usage given the removal of MicroSD by many manufacturers. (The removal of the MicroSD has been a damn inconvenience irrespective of the OTG matter.)