All of the Galleries are open to everyone - Members - Associates - Guests for viewing. Encourage away!
The only 'real' downside to not at least registering as an Associate is pictures in the individual Forum's are not shown, i.e. pictures that are attached to Posts they cannot see.
Mark
P.S. Again as a reminder the purpose of the Associate and registering is to prevent spam & helpful anonymous posts offering cheap prices on medication etc. Asking folks to register has cut down the need to police such silliness down to almost zero. We do not do anything else with the email addresses that are collected. Guests to the site - non Associates or Members - cannot posts or view pictures in posts, or vote in polls. They can do/see about everything else in the non-members area including all of the galleries.