Unfortunate Biomods

[Astromancer]

These would be fashionable bio mods with downsides. Example: Back in the 1970s there were at any meeting of the cool and fashionable (or the wannabes of such) several people who thought large amounts of Patchouli was a replacement for bathing (the horror, the horror). Now imagine modifying skin bacteria to smell as you please. I might have skin bacteria that gave off a pleasant scent of sandalwood with notes of mock orange and balsam. I'd be aware that I would still need to bathe. Others with the same mod might not. (the horror, the horror).

What are your ideas on bio mods gone very wrong.

Note: Some of these are going to be Quirks others will likely be 15 point OPHs.