Yes I also read the comment that way. The inkjet printer remark presumably refers to benchtop DNA synthesis machines which have been commercially available for a while now. (The linked article mentions the possibility of buy-back programs for old machines that don't enforce any restrictions.)
I guess it's not a bad idea to put basic hurdles in place but it would be a serious mistake to see this as any sort of comprehensive preventative. DNA just isn't difficult to manipulate.
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The thing is DNA just also isn't dangerous. It's fragile and everything in the environment destroys it - as noted it's literally a everything else which is the hard part.
This reeks of the Longtermists getting their influence into government. They were doing an entire round on YouTube about a year ago.
DNA is pretty robust. You can send a dried spot of it on a piece of filter paper and send it in the mail.