I just don't like pandering to people trying to sow FUD like "how to keep the fabric ones clean" as if maintaing fabrics is some new concept and arguing reusable bags just aren't as big as disposable plastic bags. People asking questions or making statements like that aren't genuinely asking. If they're going to be snarky about "how do I keep fabrics clean though?" they deserve snark back.
Uncertainty - "how to keep the fabric ones clean?"
Instilling doubt - clearly these reusable shopping bags just aren't as hygienic as the disposable ones. Yet another way to toss out the suggestion that these disposable bag bans aren't good, and we should stick to disposable bags, without directly stating it. Have other people reading these comments have that thought stuck in their mind, "oh yea, reusable bags aren't good, they'll have food contamination."
Unless you really think NBJack honestly never thought about laundering or washing fabrics. C'mon, even my three year old understands when fabrics get dirty they go in the washing machine.