According to the Yuasa Data Sheet they say
"Inappropiate handling or application of the cells can result in reduced cell life and peformance, electrolyte leakage, high cell tempertures, and even the posibility of smoke generation and fire."
By the way they say "and even the posibility of smoke generation and fire." it seems like they mean fire is very unlikely so I concur, there is nothing much to worry about.
http://www.s399157097.onlinehome.us/...s/LVP10-65.pdf