
ThiSong:
If a reviewer puts a major spoiler in the first three lines, it'll be seen by anyone who even just scrolls through the review pages, whether they want to or not.
For this, the white spoiler hider feature, as mentioned by Elisheva, would be a good solution.
If that's not possible, another option could be to automatically display the content of spoiler-tagged reviews only after 10–15 lines by default.
There are many users who currently leave 10–15 blank lines manually to hide spoilers. If this could be handled by the system itself, it would be a great improvement and much more convenient.