  Considered here is the periodic initial-value probem for the regularized
long-wave (BBM) equation \[u_t+u_x+uu_x-u_{xxt}=0.\] Adding to previous work in
the literature, it is shown here that for any $s < 0$, there is smooth initial
data that is small in the $L_2$-based Sobolev spaces $H^s$, but the solution
emanating from it becomes arbitrarily large in arbitrarily small time. This so
called {\it norm inflation} result has as a consequence the previously
determined conclusion that this problem is ill-posed in these negative-norm
spaces.
