They are just telling you not to lick/chew the outside labels of the glasses. You can use them. Believe me, in our lifetime lead exposure has fallen WAY down! lol
If you drink from a lead crystal goblet, your drinking lead, and they still make those, but they don't make decanters in that crystal anymore. Things have to sit in lead crystal for a while to become comtaminated to the point anyone would have to worry. The paint on the outside of a Ale glass is negligable unless you want to eat the paint off it and probably not that uncommon for mugs like that to contain lead.
Toss those babies in the freezer and pour yourself a cold one!
I just got my SFV pint glasses and they look cool!! Then I turn it over and read the warning label - they used lead and/or cadmium in the paint used to decorate the outside of the glass! Are you fucking kidding me??? Guess they are going up on the shelf as decoration.