Is it gym etiquette acceptable to use the smith machine for pull ups?

Short question: I just transferred to a new gym and found that they dont have an assisted pull up machine. Im still weak on my pull up progression, I have been practicing at home on a free standing pull up bar and can only do pull up negatives still. Sa mga pull machines meron handles for doing a pull up but I find their angles to be a bit of awkward? Mas sanay ako sa straight up bar talaga.

The other day I find someone doing rows sa smith machine so I said great, I wonder if pwede kaya full on pull ups sa smith machine? Hanggang sa maging weighted? Will that be a safe and acceptable for everyone thing to do? Or I just get used to the handle bars on top the pull machines and see what angle works for me? Thanks!