Are These Genuine Posters?

[freddiemercurystwin]

They all have similar (that it is some peculiar name followed by a space and then four numbers), just seems a bit odd:

(All removed)

I mean I know I've replied and the last one seems legit but just seems a bit weird!

 

[RandomGrinch]

Possibly related posts? - all reference non-habitable spaces.
And similar style of directness in the writing?

 

[freddiemercurystwin]

And another:

(All removed)

 

[Mottie]

Possible scammers to be - just setting up their accounts and gaining some diy credentials at the moment.