They both communicate maturely through their fingernails.

As Huffington Post noted:

On his Fox News show, Beck devoted over 17 minutes to a segment about the liberal media ignoring stories he deemed critical. Midway through that segment, he took a page out of Lohan's book by sending MSNBC a message written on his fingernails.

Images courtesy of Huffington Post:

And this from Lindsay Lohan (click to enlarge):

Previously:

• Beck slams MSNBC's Lohan coverage -- but what about Fox's?
• Breaking News: Lindsay Lohan in Court