Add a cutoff of, say, 10 comments or 10 posts...
+-------------+------+-----+--------+
| Xichekolas | pts | ct | avg |
+-------------+------+-----+--------+
| Submissions | 64 | 7 | 9.1429 |
+-------------+------+-----+--------+
| Comments | 497 | 199 | 2.4975 |
+-------------+------+-----+--------+