This person does not appear to be associated with Twitter, beyond having a Twitter account. I am not sure why news outlets are citing this person. Most likely, this person was speculating as to what using bitcoin via twitter would look like.

I would also find it very unlikely that Twitter will encourage using bitcoin on its platform. Doing so would create a lot of risks, one of which being that it gives people direct financial incentives to hack Twitter accounts. After Twitter was hacked last year, they prevented (verified?) users from posting bitcoin addresses in their tweets.

Twitter is far from a "non-evil" company for many reasons. They allow terrorists who want to commit mass murder to publish propaganda to get more people to join them, while they censor people they disagree with.

If people are displaying LN invoices as a means to receive payment, there should not be a major de-anonymization issue, as it is not trivial to get a lot of information about transaction history from a LN invoice, and is even more difficult if you are not actively monitoring a channel.

It has the potential to be even worse than what you describe. Accounts can get hijacked, and new addresses/invoices can be changed in a profile without someone creating even a single fraudulent tweet.