Processed meat itself is basically a carcinogen according to the WHO:

> Furthermore, processed meats can also contain other carcinogenic compounds such as PAHs which can be formed during smoking of meat (e.g. salami). Processed meats, particularly those containing red meat also contain heme iron, which can enhance the formation of carcinogenic compounds (NOCs) in the body.

I'm not opposed to specific, verifiable claims - "Non-foodsafe plastics are likely to leech into food especially when heated", etc. I'm entirely opposed to vague claims - "plastics are in your food and killing you!"

If you have a specific claim, then by all means make it. Don't make the claim "but nitrate laden meats!" because that is meaningless.